Adaptive control for signal processing

Abstract

An arrangement for processing data by modifying selected bit portions of coded control signals for comparison with coded input signals to control printing by a printer.

What we claimed as new and desire to secure by Letters Patent of the United States is: 
     
       1. In combination, a source of a plurality of information signals, each of said information signals comprising a coded pulse group each of which comprises a given number of information bits, said coded pulse groups representing the values of respective functions varying with time, means for algebraically combining first and second ones of said information signals to obtain combined signals comprising coded pulse groups, means for processing selected bit portions of said combined signals to obtain a first set of signals if the value of such combined signals is less than a first predetermined limit and to obtain a second set of signals if the value of such combined signals is greater than or equal to said first predetermined limit but less than a second predetermined limit and to obtain a third set of signals if the value of such combined signals is greater than or equal to said second predetermined limit, said means for processing comprising means for analyzing one of said signals that was combined to determine if its value is greater than a first predetermined limit to obtain a first given signal and to determine if its value is less than said last named first predetermined limit to obtain a second given signal, means for modifying said selected bit portions in a first manner to obtain first modified selected bit portions of said combined signals, and means for further modifying said modified bit portions of said combined signals in accordance with said first and second given signals to provide said first, second and third sets of signals. 
     
     
       2. In combination, a source of first, second and third information signals, each of said information signals comprising a coded pulses group each of which comprises a given number of information bits, said coded pulse groups representing the values of respective functions varying with time, means for algebraically combining first and second ones of said information signals to obtain combined signals comprising coded pulse groups, means for processing selected bit portions of said combined signals to obtain a first set of signals if the value of such combined signals is less than a first predetermined limit, to obtain a second set of signals if the value of such combined signals is greater than or equal to said first predetermined limit but less than a second predetermined limit and to obtain a third set of signals if the value of such combined signals is greater than or equal to said second predetermined limit, said means for processing comprising means for analyzing one of said signals that was combined to determine if its value is greater than a first predetermined limit to obtain a first given signal and to determine if its value is less than said last named first predetermined limit to obtain a second given signal, means for modifying said selected bit portions in a first manner to obtain first modified selected bit portions of said combined signals, and means for further modifying said first modified selected bit portions of said combined signals in accordance with said first and second given signals to provide said first, second and third sets of signals, and means for comparing said last named sets of signals and said third one of said information signals to provide output signals. 
     
     
       3. In combination, a source of first, second and third information signals, each of said information signals comprising a coded pulse group each of which comprises a given number of information bits, said coded pulse groups representing the values of respective functions varying with time, means for algebraically combining first and second ones of said information signals to obtain combined signals comprising coded pulse groups, means for processing selected bit portions of said combined signals to obtain a first set of signals if the value of such combined signals is less than a first predetermined limit and to obtain a second set of signals if the value of such combined signals is greater than or equal to said first predetermined limit but less than a second predetermined limit and to obtain a third set of signals if the value of such combined signals is greater than or equal to said second predetermined limit, said means for processing comprising means for analyzing one of said signals that was combined to determine if its value is greater than a first predetermined limit to obtain a first given signal and to determine if its value is less than said last named first predetermined limit to obtain a second given signal, means for modifying said selected bit portions in a first manner to obtain first modified selected bit portions of said combined signals, and means for further modifying said modified selected bit portions of said combined signals in accordance with said first and second given signals to provide said first, second and third sets of signals, and means for comparing said sets of signals and said third one of said information signals to provide output signals. 
     
     
       4. In combination, a source of first, second and third information signals, each of said information signals comprising a coded pulse group each having at least seven information bit portions, said coded pulse groups representing the value of respective functions varying with time, means for algebraically combining first and second ones of said information signals to obtain combined signals comprising coded pulse groups, means for processing the bit 6 and bit 7 portions of said combined signals to obtain a first set of signals if the value of such combined signals is less than a first predetermined limit, means for processing said bit 6 and bit 7 portions to obtain a second set of signals if the value of such combined signals is greater than or equal to said first predetermined limit but less than a second predetermined limit, means for processing said bit 6 and bit 7 portions to obtain a third set of signals if the value of such combined signals is greater than or equal to said second predetermined limit, said means for processing comprising means for analyzing one of said combined signals to determine if its value is greater than a first predetermined limit to obtain a first given signal, means for analyzing said last named one of said combined signals to determine if its value is less than said last named first predetermined limit to obtain a second given signal, means for modifying said bit 6 and bit 7 portions of said combined signals to obtain modified selected bit 6 and bit 7 portions of said combined signals, and means for further modifying said first mentioned modified bit 6 and bit 7 portions of said combined signals in accordance with said first and second given signals to provide said first, second and third sets of signals, and means for comparing said last named sets of signals and said third one of said information signals to provide second output signals.